I just purchased a CT2KIT12864Z40B kit with two 1GB DDR PC3200 modules. I installed them on an MS-6728 865G Neo2-LS board. The computer won't boot, the motherboard won't even beep nor can I get to the BIOS settings. If I reinstall my two sticks of Crucial 256MB PC3200 in the same dual channel slots the computer starts up fine again. I flashed the BIOS to the latest version and increased the DDR voltage to 2.6 instead of 2.5 but no change. With the new 1GB sticks in there it will not boot. The fans come on and that's it, no beep - nothing. I purchased it from Newegg.